// SPDX-License-Identifier: GPL-2.0-only
/*
* pata_artop . c - ARTOP ATA controller driver
*
* ( C ) 2006 Red Hat
* ( C ) 2007 , 2011 Bartlomiej Zolnierkiewicz
*
* Based in part on drivers / ide / pci / aec62xx . c
* Copyright ( C ) 1999 - 2002 Andre Hedrick < andre @ linux - ide . org >
* 865 / 865 R fixes for Macintosh card version from a patch to the old
* driver by Thibaut VARENE < varenet @ parisc - linux . org >
* When setting the PCI latency we must set 0 x80 or higher for burst
* performance Alessandro Zummo < alessandro . zummo @ towertech . it >
*
* TODO
* Investigate no_dsc on 850 R
* Clock detect
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <scsi/scsi_host.h>
#include <linux/libata.h>
#include <linux/ata.h>
#define DRV_NAME "pata_artop"
#define DRV_VERSION "0.4.8"
/*
* The ARTOP has 33 Mhz and " over clocked " timing tables . Until we
* get PCI bus speed functionality we leave this as 0 . Its a variable
* for when we get the functionality and also for folks wanting to
* test stuff .
*/
static int clock = 0 ;
/**
* artop62x0_pre_reset - probe begin
* @ link : link
* @ deadline : deadline jiffies for the operation
*
* Nothing complicated needed here .
*/
static int artop62x0_pre_reset(struct ata_link *link, unsigned long deadline)
{
static const struct pci_bits artop_enable_bits[] = {
{ 0 x4AU, 1 U, 0 x02UL, 0 x02UL }, /* port 0 */
{ 0 x4AU, 1 U, 0 x04UL, 0 x04UL }, /* port 1 */
};
struct ata_port *ap = link->ap;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
/* Odd numbered device ids are the units with enable bits. */
if ((pdev->device & 1 ) &&
!pci_test_config_bits(pdev, &artop_enable_bits[ap->port_no]))
return -ENOENT;
return ata_sff_prereset(link, deadline);
}
/**
* artop6260_cable_detect - identify cable type
* @ ap : Port
*
* Identify the cable type for the ARTOP interface in question
*/
static int artop6260_cable_detect(struct ata_port *ap)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
u8 tmp;
pci_read_config_byte(pdev, 0 x49, &tmp);
if (tmp & (1 << ap->port_no))
return ATA_CBL_PATA40;
return ATA_CBL_PATA80;
}
/**
* artop6210_load_piomode - Load a set of PATA PIO timings
* @ ap : Port whose timings we are configuring
* @ adev : Device
* @ pio : PIO mode
*
* Set PIO mode for device , in host controller PCI config space . This
* is used both to set PIO timings in PIO mode and also to set the
* matching PIO clocking for UDMA , as well as the MWDMA timings .
*
* LOCKING :
* None ( inherited from caller ) .
*/
static void artop6210_load_piomode(struct ata_port *ap, struct ata_device *adev, unsigned int pio)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
int dn = adev->devno + 2 * ap->port_no;
static const u16 timing[2 ][5 ] = {
{ 0 x0000, 0 x000A, 0 x0008, 0 x0303, 0 x0301 },
{ 0 x0700, 0 x070A, 0 x0708, 0 x0403, 0 x0401 }
};
/* Load the PIO timing active/recovery bits */
pci_write_config_word(pdev, 0 x40 + 2 * dn, timing[clock][pio]);
}
/**
* artop6210_set_piomode - Initialize host controller PATA PIO timings
* @ ap : Port whose timings we are configuring
* @ adev : Device we are configuring
*
* Set PIO mode for device , in host controller PCI config space . For
* ARTOP we must also clear the UDMA bits if we are not doing UDMA . In
* the event UDMA is used the later call to set_dmamode will set the
* bits as required .
*
* LOCKING :
* None ( inherited from caller ) .
*/
static void artop6210_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
int dn = adev->devno + 2 * ap->port_no;
u8 ultra;
artop6210_load_piomode(ap, adev, adev->pio_mode - XFER_PIO_0);
/* Clear the UDMA mode bits (set_dmamode will redo this if needed) */
pci_read_config_byte(pdev, 0 x54, &ultra);
ultra &= ~(3 << (2 * dn));
pci_write_config_byte(pdev, 0 x54, ultra);
}
/**
* artop6260_load_piomode - Initialize host controller PATA PIO timings
* @ ap : Port whose timings we are configuring
* @ adev : Device we are configuring
* @ pio : PIO mode
*
* Set PIO mode for device , in host controller PCI config space . The
* ARTOP6260 and relatives store the timing data differently .
*
* LOCKING :
* None ( inherited from caller ) .
*/
static void artop6260_load_piomode (struct ata_port *ap, struct ata_device *adev, unsigned int pio)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
int dn = adev->devno + 2 * ap->port_no;
static const u8 timing[2 ][5 ] = {
{ 0 x00, 0 x0A, 0 x08, 0 x33, 0 x31 },
{ 0 x70, 0 x7A, 0 x78, 0 x43, 0 x41 }
};
/* Load the PIO timing active/recovery bits */
pci_write_config_byte(pdev, 0 x40 + dn, timing[clock][pio]);
}
/**
* artop6260_set_piomode - Initialize host controller PATA PIO timings
* @ ap : Port whose timings we are configuring
* @ adev : Device we are configuring
*
* Set PIO mode for device , in host controller PCI config space . For
* ARTOP we must also clear the UDMA bits if we are not doing UDMA . In
* the event UDMA is used the later call to set_dmamode will set the
* bits as required .
*
* LOCKING :
* None ( inherited from caller ) .
*/
static void artop6260_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
u8 ultra;
artop6260_load_piomode(ap, adev, adev->pio_mode - XFER_PIO_0);
/* Clear the UDMA mode bits (set_dmamode will redo this if needed) */
pci_read_config_byte(pdev, 0 x44 + ap->port_no, &ultra);
ultra &= ~(7 << (4 * adev->devno)); /* One nibble per drive */
pci_write_config_byte(pdev, 0 x44 + ap->port_no, ultra);
}
/**
* artop6210_set_dmamode - Initialize host controller PATA PIO timings
* @ ap : Port whose timings we are configuring
* @ adev : Device whose timings we are configuring
*
* Set DMA mode for device , in host controller PCI config space .
*
* LOCKING :
* None ( inherited from caller ) .
*/
static void artop6210_set_dmamode (struct ata_port *ap, struct ata_device *adev)
{
unsigned int pio;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
int dn = adev->devno + 2 * ap->port_no;
u8 ultra;
if (adev->dma_mode == XFER_MW_DMA_0)
pio = 1 ;
else
pio = 4 ;
/* Load the PIO timing active/recovery bits */
artop6210_load_piomode(ap, adev, pio);
pci_read_config_byte(pdev, 0 x54, &ultra);
ultra &= ~(3 << (2 * dn));
/* Add ultra DMA bits if in UDMA mode */
if (adev->dma_mode >= XFER_UDMA_0) {
u8 mode = (adev->dma_mode - XFER_UDMA_0) + 1 - clock;
if (mode == 0 )
mode = 1 ;
ultra |= (mode << (2 * dn));
}
pci_write_config_byte(pdev, 0 x54, ultra);
}
/**
* artop6260_set_dmamode - Initialize host controller PATA PIO timings
* @ ap : Port whose timings we are configuring
* @ adev : Device we are configuring
*
* Set DMA mode for device , in host controller PCI config space . The
* ARTOP6260 and relatives store the timing data differently .
*
* LOCKING :
* None ( inherited from caller ) .
*/
static void artop6260_set_dmamode (struct ata_port *ap, struct ata_device *adev)
{
unsigned int pio;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
u8 ultra;
if (adev->dma_mode == XFER_MW_DMA_0)
pio = 1 ;
else
pio = 4 ;
/* Load the PIO timing active/recovery bits */
artop6260_load_piomode(ap, adev, pio);
/* Add ultra DMA bits if in UDMA mode */
pci_read_config_byte(pdev, 0 x44 + ap->port_no, &ultra);
ultra &= ~(7 << (4 * adev->devno)); /* One nibble per drive */
if (adev->dma_mode >= XFER_UDMA_0) {
u8 mode = adev->dma_mode - XFER_UDMA_0 + 1 - clock;
if (mode == 0 )
mode = 1 ;
ultra |= (mode << (4 * adev->devno));
}
pci_write_config_byte(pdev, 0 x44 + ap->port_no, ultra);
}
/**
* artop6210_qc_defer - implement serialization
* @ qc : command
*
* Issue commands per host on this chip .
*/
static int artop6210_qc_defer(struct ata_queued_cmd *qc)
{
struct ata_host *host = qc->ap->host;
struct ata_port *alt = host->ports[1 ^ qc->ap->port_no];
int rc;
/* First apply the usual rules */
rc = ata_std_qc_defer(qc);
if (rc != 0 )
return rc;
/* Now apply serialization rules. Only allow a command if the
other channel state machine is idle */
if (alt && alt->qc_active)
return ATA_DEFER_PORT;
return 0 ;
}
static const struct scsi_host_template artop_sht = {
ATA_BMDMA_SHT(DRV_NAME),
};
static struct ata_port_operations artop6210_ops = {
.inherits = &ata_bmdma_port_ops,
.cable_detect = ata_cable_40wire,
.set_piomode = artop6210_set_piomode,
.set_dmamode = artop6210_set_dmamode,
.reset.prereset = artop62x0_pre_reset,
.qc_defer = artop6210_qc_defer,
};
static struct ata_port_operations artop6260_ops = {
.inherits = &ata_bmdma_port_ops,
.cable_detect = artop6260_cable_detect,
.set_piomode = artop6260_set_piomode,
.set_dmamode = artop6260_set_dmamode,
.reset.prereset = artop62x0_pre_reset,
};
static void atp8xx_fixup(struct pci_dev *pdev)
{
u8 reg;
switch (pdev->device) {
case 0 x0005:
/* BIOS may have left us in UDMA, clear it before libata probe */
pci_write_config_byte(pdev, 0 x54, 0 );
break ;
case 0 x0008:
case 0 x0009:
/* Mac systems come up with some registers not set as we
will need them */
/* Clear reset & test bits */
pci_read_config_byte(pdev, 0 x49, ®);
pci_write_config_byte(pdev, 0 x49, reg & ~0 x30);
/* PCI latency must be > 0x80 for burst mode, tweak it
* if required .
*/
pci_read_config_byte(pdev, PCI_LATENCY_TIMER, ®);
if (reg <= 0 x80)
pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0 x90);
/* Enable IRQ output and burst mode */
pci_read_config_byte(pdev, 0 x4a, ®);
pci_write_config_byte(pdev, 0 x4a, (reg & ~0 x01) | 0 x80);
break ;
}
}
/**
* artop_init_one - Register ARTOP ATA PCI device with kernel services
* @ pdev : PCI device to register
* @ id : PCI device ID
*
* Called from kernel PCI layer .
*
* LOCKING :
* Inherited from PCI layer ( may sleep ) .
*
* RETURNS :
* Zero on success , or - ERRNO value .
*/
static int artop_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
{
static const struct ata_port_info info_6210 = {
.flags = ATA_FLAG_SLAVE_POSS,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA2,
.udma_mask = ATA_UDMA2,
.port_ops = &artop6210_ops,
};
static const struct ata_port_info info_626x = {
.flags = ATA_FLAG_SLAVE_POSS,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA2,
.udma_mask = ATA_UDMA4,
.port_ops = &artop6260_ops,
};
static const struct ata_port_info info_628x = {
.flags = ATA_FLAG_SLAVE_POSS,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA2,
.udma_mask = ATA_UDMA5,
.port_ops = &artop6260_ops,
};
static const struct ata_port_info info_628x_fast = {
.flags = ATA_FLAG_SLAVE_POSS,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA2,
.udma_mask = ATA_UDMA6,
.port_ops = &artop6260_ops,
};
const struct ata_port_info *ppi[] = { NULL, NULL };
int rc;
ata_print_version_once(&pdev->dev, DRV_VERSION);
rc = pcim_enable_device(pdev);
if (rc)
return rc;
switch (id->driver_data) {
case 0 : /* 6210 variant */
ppi[0 ] = &info_6210;
break ;
case 1 : /* 6260 */
ppi[0 ] = &info_626x;
break ;
case 2 : /* 6280 or 6280 + fast */
if (inb(pci_resource_start(pdev, 4 )) & 0 x10)
ppi[0 ] = &info_628x_fast;
else
ppi[0 ] = &info_628x;
break ;
}
BUG_ON(ppi[0 ] == NULL);
atp8xx_fixup(pdev);
return ata_pci_bmdma_init_one(pdev, ppi, &artop_sht, NULL, 0 );
}
static const struct pci_device_id artop_pci_tbl[] = {
{ PCI_VDEVICE(ARTOP, 0 x0005), 0 },
{ PCI_VDEVICE(ARTOP, 0 x0006), 1 },
{ PCI_VDEVICE(ARTOP, 0 x0007), 1 },
{ PCI_VDEVICE(ARTOP, 0 x0008), 2 },
{ PCI_VDEVICE(ARTOP, 0 x0009), 2 },
{ } /* terminate list */
};
#ifdef CONFIG_PM_SLEEP
static int atp8xx_reinit_one(struct pci_dev *pdev)
{
struct ata_host *host = pci_get_drvdata(pdev);
int rc;
rc = ata_pci_device_do_resume(pdev);
if (rc)
return rc;
atp8xx_fixup(pdev);
ata_host_resume(host);
return 0 ;
}
#endif
static struct pci_driver artop_pci_driver = {
.name = DRV_NAME,
.id_table = artop_pci_tbl,
.probe = artop_init_one,
.remove = ata_pci_remove_one,
#ifdef CONFIG_PM_SLEEP
.suspend = ata_pci_device_suspend,
.resume = atp8xx_reinit_one,
#endif
};
module_pci_driver(artop_pci_driver);
MODULE_AUTHOR("Alan Cox, Bartlomiej Zolnierkiewicz" );
MODULE_DESCRIPTION("SCSI low-level driver for ARTOP PATA" );
MODULE_LICENSE("GPL" );
MODULE_DEVICE_TABLE(pci, artop_pci_tbl);
MODULE_VERSION(DRV_VERSION);
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